Category: Physics

Does melting point increase across a period? Melting and boiling points increase across the three metals because of the increasing strength of their metallic bonds. The number of electrons which each atom can contribute to the delocalized “sea of electrons” increases. The atoms also get smaller and have more protons as you go from sodium […]

At which stage is potential energy at its minimum? The potential energy due to gravity is at a minimum, since the mass is lifted the least amount above ground. In fact, if ground level is imagined at the bottom of the motion, the potential energy due to gravity is zero at this point of the […]

Does oxygen have a fixed shape? The state that a given substance exhibits is also a physical property. Some substances exist as gases at room temperature (oxygen and carbon dioxide), while others, like water and mercury metal, exist as liquids. (a) Solid O2 has a fixed volume and shape, and the molecules are packed tightly […]

Can you solve physics problems? Multiply and divide the quantities until the units match the units of the answer quantity. For example, if you’re trying to find Potential Energy (kg*m2/s2) and you have the height (m), mass (kg) and gravitational acceleration (m/s2), you can match the units by multiplying the three quantities (m*kg*m/s2=kg*m2/s2). How do […]

What do u mean by runoff? noun. something that drains or flows off, as rain that flows off from the land in streams. What is difference between runoff and streamflow? Streamflow, or channel runoff, is the flow of water in streams, rivers, and other channels, and is a major element of the water cycle. It […]

What did Aristotle say about the moon? For Aristotle the moon had been a perfect sphere, and that was how people still saw it in 1609. A perfect sphere, of course, is perfectly smooth. The pure moon was not of base earth. What did ancients think of the moon? Through persistent observation, Anaxagoras came to […]

What is the force in Newtons on each load? The unit of force is the Newton (N) – where one newton is one kilogram metre per second squared. The Newton is defined as the force which, when applied to a mass of one kilogram, gives an acceleration of one meter per second squared. F = […]

Does changing current affect voltage? To answer this question, the relationship between the voltage and current variables given must be specified. and thus that the current will change proportionally with the voltage. and thus the current will change exponentially with the voltage. Does higher voltage draw less current? If the voltage out is twice that […]

What does it mean when a ambulance lights are on but no siren? Generally, when the lights are on but the siren is not activated, the crew is just tired of hearing the noise and only using the siren at intersections. The problem with that is that it’s not legal. Why does an ambulance not […]

How far should wires be kept from the metal vent connector on a gas appliance? SIX INCHES Which one of the following is a reliable indicator of service amperage? White wires can sometimes act as black wires in 240 volt circuits. Which one of the following is a reliable indicator of service amperage? The answer […]